Tosic said: "It may be good for me Cristiano has left but I think someone will come in his place.
"These games here are very important for me and then when we go on tour to Asia next month I hope I get a chance and I'm ready for it.
"From the moment I watched United win the Champions League in 1999 I was a fan.
"When I was a kid I saw a picture of the national team in the changing room and I said to the coach 'I am going to stand there one day and I am going to be a Manchester United player, those are my two wishes'.
"It is great to have Nemanja Vidic at United. He lives five minutes away. I knew him from before playing for Serbia and we spend a lot of time together.
"Playing with the likes of Wayne Rooney is brilliant and Ryan Giggs and Paul Scholes are fantastic with me."
The midfielder added: "I'm so pleased to be at United and to work with someone like Alex Ferguson. Can I understand what he says? No! But I'm learning English and getting better."